As I travel a bunch and speak at conferences, one never knows what the AV setup will be. With that said, I carry the following kit.  It's saved me a few times as well as the bacon of a many co-presenter!

• Grid It
• Mini Display Port to HDMI
• Mini Display Port to VGA
• Logitech Presenter
• Sonnet FW 400-800 adapter
• USB-C to HDMI (not shown as it was being used when I took this picture)
• Plastic Fork.  Ya never know!
• Pen